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| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2015-02-27 22:05:21 -0800 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2015-04-07 23:25:59 -0700 |
| commit | 38b57f82f66dfb21ebe321d71c84c0e3469980c4 (patch) | |
| tree | c5e5727d222617a6c59013f0b597b47e4f3dd9ce /include/target/target_core_fabric.h | |
| parent | 823ddd877f3a5c301490196d369f68baa6c020e4 (diff) | |
| download | lwn-38b57f82f66dfb21ebe321d71c84c0e3469980c4.tar.gz lwn-38b57f82f66dfb21ebe321d71c84c0e3469980c4.zip | |
target: Add protected fabric + unprotected device support
This patch adds a new target_core_fabric_ops callback for allowing fabric
drivers to expose a TPG attribute for signaling when a T10-PI protected
fabric wants to function with an un-protected device without T10-PI.
This specifically is to allow LIO to perform WRITE_STRIP + READ_INSERT
operations when functioning with non T10-PI enabled devices, seperate
from any available hw offloads the fabric supports.
This is done using a new se_sess->sess_prot_type that is set at fabric
session creation time based upon the TPG attribute. It currently cannot
be changed for individual sessions after initial creation.
Also, update existing target_core_sbc.c code to honor sess_prot_type when
setting up cmd->prot_op + cmd->prot_type assignments.
(Add unlikely and !! boolean conversion in sbc_check_prot - Sagi)
Cc: Martin Petersen <martin.petersen@oracle.com>
Cc: Sagi Grimberg <sagig@mellanox.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Doug Gilbert <dgilbert@interlog.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'include/target/target_core_fabric.h')
| -rw-r--r-- | include/target/target_core_fabric.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/target/target_core_fabric.h b/include/target/target_core_fabric.h index 2f4a2505db4c..c93cfdf0d8e5 100644 --- a/include/target/target_core_fabric.h +++ b/include/target/target_core_fabric.h @@ -27,6 +27,14 @@ struct target_core_fabric_ops { * inquiry response */ int (*tpg_check_demo_mode_login_only)(struct se_portal_group *); + /* + * Optionally used as a configfs tunable to determine when + * target-core should signal the PROTECT=1 feature bit for + * backends that don't support T10-PI, so that either fabric + * HW offload or target-core emulation performs the associated + * WRITE_STRIP and READ_INSERT operations. + */ + int (*tpg_check_prot_fabric_only)(struct se_portal_group *); struct se_node_acl *(*tpg_alloc_fabric_acl)( struct se_portal_group *); void (*tpg_release_fabric_acl)(struct se_portal_group *, |